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收集整理的這篇文章主要介紹了
网站集成支付宝
小編覺得挺不錯的,現在分享給大家,幫大家做個參考.
剛在Javaeye看到一篇文章，關于網站集成支付寶的，正是我之前想了解的，不過作者寫得有些零亂，解釋也不太清楚，代碼格式更是看著郁悶，待以后有空消化消化，再實踐下，現先貼出來保存著吧。
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（本文轉載于http://stephen830.javaeye.com/blog/254827 )
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國內電子商務系統實現的基本流程如下：
客戶在系統內下訂單 -> 系統根據訂單生成支付寶接口url -> 客戶通過url使用支付寶（網上銀行）付款 -> 支付寶將客戶的付款完成信息發送給電子商務系統 -> 系統收到支付寶信息后確定客戶訂單已經付款 -> 進行發貨等后續流程。
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在開始下面的內容之前,你要先有一個支付寶賬戶,如果要集成支付寶接口,你還必須申請開通服務(關于如何開通,可以直接到支付寶網站上申請).在服 務開通后,支付寶會給你2個字符串編號:1個partnerId(合作伙伴ID),還有1個securityCode(安全碼).當你拿到這2個碼的時候 就可以開始下面的內容了.
（1）如何調用支付寶接口？（將客戶的訂單信息按照既定的規則生成一個url跳轉到支付寶網站）
通過下面方法[makeOrderAlipayUrl(HttpServletRequest httpRequest,Order order)]的調用得到支付寶的url,然后進行跳轉(response.sendRedirect(url);).
Java代碼 ?
? ? ? ? ? ? ???? ????public ? static ?String?makeOrderAlipayUrl(HttpServletRequest?httpRequest,Order?order)? throws ?Exception?{????? ????????HashMap?hm?=?new ?HashMap();????? ????????hm.put("_input_charset" ,httpRequest.getCharacterEncoding()); ?? ????????hm.put("body" , "您在www.xxx.com上的訂單" ); ?? ????????hm.put("discount" , "-5" ); ?? ????????hm.put("logistics_fee" , "10" ); ?? ????????hm.put("logistics_payment" , "BUYER_PAY" ); ?? ????????hm.put("logistics_type" , "EXPRESS" ); ?? ????????hm.put("notify_url" , "http://www.xxx.com/notifyurl.jsp" );//客戶付款后,支付寶調用的頁面????? ????????hm.put("out_trade_no" ,order.getId()); ?? ????????hm.put("partner" ,partnerId); ?? ????????hm.put("agent" ,partnerId); ?? ????????hm.put("payment_type" , "1" ); ?? ????????hm.put("price" , "105.30" ); ?? ????????hm.put("quantity" , "1" ); ?? ????????hm.put("return_url" , "http://www.xxx.com/ReturnUrl.jsp" );//客戶付款成功后,顯示給客戶的頁面????? ????????hm.put("seller_email" , "alipay@xxx.com" ); ?? ????????hm.put("service" , "create_direct_pay_by_user" ); ?? ????????hm.put("subject" , "www.xxx.com的訂單" ); ?? ????????String?payGateway?=?"https://www.alipay.com/cooperate/gateway.do?" ;//跳轉到支付寶的url頭????? ????????return ?makeUrl(hm,securityCode,httpRequest.getCharacterEncoding(),payGateway); ?? ????}????? ????????? ????????? ???? ? ? ? ? ? ? ? ???? ????public ? static ?String?makeUrl(HashMap?hm,String?securityCode,String?charset,String?payGateway)? throws ?Exception{????? ????????List?keys?=?new ?ArrayList(hm.keySet());????? ????????Collections.sort(keys); ?? ????????StringBuffer?content?=?new ?StringBuffer();????? ????????for ?( int ?i?=? 0 ;?i?<?keys.size();?i++)?{????? ????????????content.append((String)?keys.get(i));????? ????????????content.append("=" );????? ????????????content.append((String)?hm.get((String)?keys.get(i)));????? ????????????if ?(i?!=?keys.size()?-? 1 )?{????? ????????????????content.append("&" );????? ????????????}????? ????????}????? ????????content.append(securityCode);????? ????????String?sign?=?md5(content.toString(),charset);????? ????????content.delete(0 ,content.length());????? ????????content.append(payGateway);????? ????????for ?( int ?i?=? 0 ;?i?<?keys.size();?i++)?{????? ????????????content.append(keys.get(i));????? ????????????content.append("=" );????? ????????????content.append(URLEncoder.encode((String)?hm.get(keys.get(i)),?charset));????? ????????????content.append("&" );????? ????????}????? ????????content.append("sign=" );????? ????????content.append(sign);????? ????????content.append("&sign_type=MD5" );????? ????????keys.clear();????? ????????keys?=?null ;????? ????????return ?content.toString();????? ????}????? ????????? ???? ? ? ? ? ? ? ???? ????public ? static ?String?md5(String?str,String?charset)?{????? ????????if ?(str?==? null )????? ????????????return ? null ;????? ????????char ?hexDigits[]?=?{? '0' ,? '1' ,? '2' ,? '3' ,? '4' ,? '5' ,? '6' ,? '7' ,? '8' ,? '9' ,????? ????????????????'a' ,? 'b' ,? 'c' ,? 'd' ,? 'e' ,? 'f' ?};????? ????????????? ????????MessageDigest?md5MessageDigest?=?null ;????? ????????byte []?md5Bytes?=? null ;????? ????????char ?md5Chars[]?=? null ;????? ????????byte []?strBytes?=? null ;????? ????????try ?{????? ????????????strBytes?=?str.getBytes(charset);????? ????????????md5MessageDigest?=?MessageDigest.getInstance("MD5" );????? ????????????md5MessageDigest.update(strBytes);????? ????????????md5Bytes?=?md5MessageDigest.digest();????? ????????????int ?j?=?md5Bytes.length;????? ????????????md5Chars?=?new ? char [j?*? 2 ];????? ????????????int ?k?=? 0 ;????? ????????????for ?( int ?i?=? 0 ;?i?<?j;?i++)?{????? ????????????????byte ?md5Byte?=?md5Bytes[i];????? ????????????????md5Chars[k++]?=?hexDigits[md5Byte?>>>?4 ?&? 0xf ];????? ????????????????md5Chars[k++]?=?hexDigits[md5Byte?&?0xf ];????? ????????????}????? ????????????return ? new ?String(md5Chars);????? ????????}?catch ?(NoSuchAlgorithmException?e)?{????? ???????????? ?? ????????????return ? null ;????? ????????}?catch ?(UnsupportedEncodingException?e)?{????? ???????????? ?? ????????????return ? null ;????? ????????}?finally ?{????? ????????????md5MessageDigest?=?null ;????? ????????????strBytes?=?null ;????? ????????????md5Bytes?=?null ;????? ????????}????? ????}????
/** * 根據訂單生成支付寶接口URL. * @param httpRequest * @param order 訂單實例 * @return * @throws Exception */ public static String makeOrderAlipayUrl(HttpServletRequest httpRequest,Order order) throws Exception { HashMap hm = new HashMap(); hm.put("_input_charset",httpRequest.getCharacterEncoding());//采用相同的編碼方式 hm.put("body","您在www.xxx.com上的訂單");//填寫在跳到支付寶頁面上顯示的付款內容信息 hm.put("discount","-5");//填寫折扣信息 -5表示抵扣5元 hm.put("logistics_fee","10");//物流費用 hm.put("logistics_payment","BUYER_PAY");//物流費用支付人 BUYER_PAY=買家支付物流費用 hm.put("logistics_type","EXPRESS");//物流方式 hm.put("notify_url","http://www.xxx.com/notifyurl.jsp");//客戶付款后,支付寶調用的頁面 hm.put("out_trade_no",order.getId());//外部交易號,最好具有唯一性,在獲取支付寶發來的付款信息時使用. hm.put("partner",partnerId);//partnerId(合作伙伴ID) hm.put("agent",partnerId);//partnerId(合作伙伴ID) hm.put("payment_type","1");//支付類型 1=商品購買,2=服務購買,... hm.put("price","105.30");//訂單金額信息 hm.put("quantity","1");//訂單商品數量,一般都是寫1,它是按照整個訂單包來計算 hm.put("return_url","http://www.xxx.com/ReturnUrl.jsp");//客戶付款成功后,顯示給客戶的頁面 hm.put("seller_email","alipay@xxx.com");//你的支付寶賬戶email hm.put("service","create_direct_pay_by_user");//create_direct_pay_by_user=直接付款,trade_create_by_buyer 擔保付款 hm.put("subject","www.xxx.com的訂單");//填寫在跳到支付寶頁面上顯示的付款標題信息 String payGateway = "https://www.alipay.com/cooperate/gateway.do?";//跳轉到支付寶的url頭 return makeUrl(hm,securityCode,httpRequest.getCharacterEncoding(),payGateway);//securityCode(安全碼) } /** * 根據傳入的參數生成alipay的支付URL * @param hm 參數值 * @param securityCode 安全碼 * @param charset 編碼 * @param payGateway 支付寶gateway * @return */ public static String makeUrl(HashMap hm,String securityCode,String charset,String payGateway) throws Exception{ List keys = new ArrayList(hm.keySet()); Collections.sort(keys);//支付寶要求參數必須按字母排序 StringBuffer content = new StringBuffer(); for (int i = 0; i < keys.size(); i++) { content.append((String) keys.get(i)); content.append("="); content.append((String) hm.get((String) keys.get(i))); if (i != keys.size() - 1) { content.append("&"); } } content.append(securityCode); String sign = md5(content.toString(),charset); content.delete(0,content.length()); content.append(payGateway); for (int i = 0; i < keys.size(); i++) { content.append(keys.get(i)); content.append("="); content.append(URLEncoder.encode((String) hm.get(keys.get(i)), charset)); content.append("&"); } content.append("sign="); content.append(sign); content.append("&sign_type=MD5"); keys.clear(); keys = null; return content.toString(); } /** * 生成md5編碼字符串. * @param str 源字符串 * @param charset 編碼方式 * @return * */ public static String md5(String str,String charset) { if (str == null) return null; char hexDigits[] = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'a', 'b', 'c', 'd', 'e', 'f' }; MessageDigest md5MessageDigest = null; byte[] md5Bytes = null; char md5Chars[] = null; byte[] strBytes = null; try { strBytes = str.getBytes(charset); md5MessageDigest = MessageDigest.getInstance("MD5"); md5MessageDigest.update(strBytes); md5Bytes = md5MessageDigest.digest(); int j = md5Bytes.length; md5Chars = new char[j * 2]; int k = 0; for (int i = 0; i < j; i++) { byte md5Byte = md5Bytes[i]; md5Chars[k++] = hexDigits[md5Byte >>> 4 & 0xf]; md5Chars[k++] = hexDigits[md5Byte & 0xf]; } return new String(md5Chars); } catch (NoSuchAlgorithmException e) { //Log.output(e.toString(), Log.STD_ERR); return null; } catch (UnsupportedEncodingException e) { //Log.output(e.toString(), Log.STD_ERR); return null; } finally { md5MessageDigest = null; strBytes = null; md5Bytes = null; } }
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當客戶通過接口url付款后,支付寶會自動的去調用前面提供的[notify_url]參數中的url.
（2）支付寶將付款信息返回給系統
當客戶付款后，支付寶就會自動調用上面表單提供的[notify_url]，下面是一個[notifyurl.jsp]的一個例子：
Java代碼 ?
<%@?page?contentType= "text/html;charset=UTF-8" %><%@?page? import = "com.soft4j.AlipayMgr" %><%????? ????String?ret?=?AlipayMgr.insert(request);????? ????if (ret== null ){????? ????????out.print("success" ); ?? ????}else {????? ????????out.print("fail" ); ?? ????}????? %>??
<%@ page contentType="text/html;charset=UTF-8"%><%@ page import="com.soft4j.AlipayMgr"%><% String ret = AlipayMgr.insert(request); if(ret==null){ out.print("success");//成功接收支付寶發來的付款信息 }else{ out.print("fail");//出錯 }
%>
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如果確認收到支付寶發來的客戶付款信息，則返回"success"，這樣子支付寶就知道系統已經收到信息了；否則返回"fail"，這樣支付寶會過 一段時間后再次發來。其實，只有當支付寶收到"success"的返回信息后才會停止發送付款信息，否則會自動的每隔一段時間就調用上面
的[notify_url]通信接口。
（3）系統處理支付寶發來的付款信息
Java代碼 ?
? ? ? ? ? ???? package ?com.soft4j;????? ???? import ?java.sql.Connection;????? import ?java.sql.SQLException;????? import ?java.util.Enumeration;????? import ?java.util.Vector;????? import ?javax.servlet.http.HttpServletRequest;????? ???? ? ? ? ? ? ???? public ? final ? class ?NotifyUrlMgr?{????? ????????? ????????? ????public ? static ?String?insert(HttpServletRequest?httpRequest)?{????? ????????????? ???????? ?? ????????Enumeration?parameterNames?=?null ;????? ????????String?parameterName?=?null ;????? ????????String?parameterValue?=?null ;????? ????????int ?count?=? 0 ;????? ????????Vector[]?params?=?null ;????? ????????Vector?vParameterName?=?new ?Vector();????? ????????Vector?vParameterValue?=?new ?Vector();????? ????????????? ????????try ?{????? ????????????String?orderId?=?httpRequest.getParameter("out_trade_no" ); ?? ????????????if (orderId== null || "" .equals(orderId))?orderId= "-1" ;????? ????????????parameterNames?=?httpRequest.getParameterNames();????? ????????????boolean ?isPrint?=? false ;????? ????????????while ?(parameterNames.hasMoreElements())?{ ?? ????????????????parameterName?=?(String)?parameterNames.nextElement();????? ????????????????parameterValue?=?httpRequest.getParameter(parameterName);????? ????????????????if (parameterValue== null )?parameterValue= "" ;????? ????????????????vParameterName.add(parameterName);????? ????????????????vParameterValue.add(parameterValue);????? ????????????????count++;????? ????????????}????? ????????????????? ???????????? ?? ????????????????? ????????????return ? null ;????? ????????}?catch ?(Exception?e)?{????? ????????????return ?e.toString();????? ????????}?finally ?{????? ???????????? ?? ????????}????? ????}????? ???? }?
總結
以上是生活随笔為你收集整理的网站集成支付宝的全部內容，希望文章能夠幫你解決所遇到的問題。
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